Improvement in rowlocks



B. SNIPPIN. Rowlook.

No. 219,775. Patented Sept. 16, I879.

WITNESS w INVENTOR: J 5f 1211/ W BY Q ATTORNEYS N, PETERS.PHOTO-UTNOGRAFHER. WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

BENJAMIN SNIFFIN, OF

SING SING, NEW YORK.

IMPROVEMENT lN ROWLOCKS.

Specification forming part of Letters Patent N 0. 219,775, datedSeptember 16, 1879 application filed July 31, 1879.

To all whom it may concern:

Be it known that I, BENJAMIN SNLFFIN, of Sing Sing, in the county ofWestchester and State of New York, have invented a new and ImprovedRowlock, of which the following is a specification] v Figure 1 is a topview of one of my improved rowlocks. Fig. 2 is a longitudinal section ofthe same, taken through line a: 00, Fig. 1. Fig. 3 is a cross-section ofthe same, taken through line y y, Fig. 1.

The object of this invention is to furnish rowlocks which shall be soconstructed as to support the cars firmly when in use, and at the sametime maybe readily detached from the gunwale 0f the boat when not inuse.

The invention consists in the rowlock provided with a tapered dovetailedbase plate and a set-screw, in combination with a bedplate provided witha tapered dovetailed groove, as hereinafter fully described.

A represents the bed-plate of a rowlock, which is designedto'be securelyfastened to the gunwale of the boat.

In the upper side of the bed -plate A is formed a longitudinal tapereddovetailed groove, 0/, to receive the dovetailed base-plateb of the lockB. i

The base-plate b' is tapered to correspond with the taper of the groovea in the bedplate A. it

The bed-plate A is attached to the gunwale with the narrower end of itsgroove toward the bow of the boat, so that the pressure of the oar inrowing will tend to draw the baseplate b farther into the said groove a,and thus make the rowloek more firm and secure. The base-plate b is heldagainst being pushed out of its grooveby the pressure of the oar, whenbacking water, by a set-screw, C, which passes through a screw-hole inthe rear or wider part of the base-plate I), so that its forward end mayrest against the bed-plate A, as shown in Fig. 2. y

I am aware that it is not new to provide a rowlock with a dovetailedbase-fitting recess of bed-plate; but this brings the whole leverageacross the tenon and will soon result in a fracture under a vigorouspull, while mine brings the leverage close to the gunwale, so that theharder the pull the greater is the resistance. i

What I claim as new and The rowloek B, provided withjaiapered dovetailedbase-plate, b, and a setscrew, O, in combination with abed-plate,*A,provided with a tapered dovetailed groove,}a, substantiallyas herein shown and described.

hi BENJAMIN sNIFFIN.

mark.

of my invention Witnesses A. HYATT, O. O. YEOMANS.

